GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1995 🢒 Yukon - 4WD 🢒 Bulletins 🢒 CAMPAIGN:TRANSMISSION FAILURE

CAMPAIGN:TRANSMISSION FAILURE

*SUB CUSTOMER SATISFACTION CAMPAIGN 95-C-14

*SUB BROKEN FOURTH CLUTCH HOUSING BOLT

TO: ALL CHEVROLET-GEO DEALERS

ATTENTION:

SERVICE, PARTS, AND SALES MANAGERS

MODEL & YEAR: 1995 C/K TRUCKS & G-VANS WITH 4L80E AUTOMATIC TRANSMISSION

IMPORTANT

RETAIN THIS ADMINISTRATIVE MESSAGE WITH DEALER CAMPAIGN BULLETINS. A RED TOP BULLETIN WILL NOT BE PROVIDED

GENERAL MOTORS HAS DETERMINED THAT CERTAIN 1995 CHEVROLET C/K TRUCKS OR G-VANS EQUIPPED WITH A 4L80E AUTOMATIC TRANSMISSION MAY FAIL TO SHIFT INTO FOURTH GEAR DUE TO A CRACKED OR BROKEN FOURTH CLUTCH HOUSING BOLT. THE FOURTH CLUTCH HOUSING BOLT IS HOLLOW AND IS USED IN THE HYDRAULIC CIRCUIT.

VEHICLES INVOLVED

ALL VEHICLES INVOLVED IN THIS CAMPAIGN WERE PLACED ON STOP DELIVERY/SALE STATUS ON 11/3/94 REFER TO ADMINISTRATIVE MESSAGE 02-499. THEY ARE ALSO LISTED AT THE END OF THIS MESSAGE. ONCE THE CAMPAIGN SERVICE PROCEDURE HAS BEEN COMPLETED, THE VEHICLE MAY BE RELEASED FOR SALE/DELIVERY.

OWNER NOTIFICATION

ALL VEHICLES INVOLVED WERE STOPPED PRIOR TO DELIVERY TO CUSTOMERS. THEREFORE, THERE WILL BE NO OWNER NOTIFICATION FROM CHEVROLET. IF A VEHICLE WAS SOLD OR DELIVERED TO A CUSTOMER, THE DEALER SHOULD CONTACT THE OWNER AND MAKE ARRANGEMENTS TO PERFORM THE CAMPAIGN SERVICE PROCEDURE.

DEALER CAMPAIGN RESPONSIBILITY

ALL NEW INVOLVED VEHICLES IN DEALER'S POSSESSION MUST BE REPAIRED PER THE SERVICE PROCEDURE BEFORE THE VEHICLES ARE SOLD OR DELIVERED. DEALERS ARE TO SERVICE ALL VEHICLES SUBJECT TO THIS CAMPAIGN AT NO CHARGE TO OWNERS, REGARDLESS OF MILEAGE, AGE OF VEHICLE, OR OWNERSHIP, FROM THIS TIME FORWARD.

IN SUMMARY, WHENEVER A VEHICLE SUBJECT TO THIS CAMPAIGN ENTERS YOUR VEHICLE INVENTORY, OR IS IN YOUR DEALERSHIP FOR SERVICE, PLEASE TAKE THE STEPS NECESSARY TO BE SURE THE CAMPAIGN CORRECTION HAS BEEN COMPLETED.

PARTS INFORMATION

PARTS REQUIRED TO COMPLETE THIS CAMPAIGN ARE TO BE OBTAINED FROM GENERAL MOTORS SERVICE PARTS OPERATIONS (GMSPO). TO ENSURE THESE PARTS WILL BE OBTAINED AS SOON AS POSSIBLE THEY SHOULD BE ORDERED FROM GMSPO ON A "C.I.O." ORDER WITH NO SPECIAL INSTRUCTION CODE, BUT ON AN ADVISE CODE (2).

PART NUMBER DESCRIPTION QUANTITY

12346143 TRANSMISSION FLUID-DEXRON III 8 QTS.

8684205 VALVE BODY CASE GASKET 1

8686124 BOLT - CASE TO 4TH CLUTCH 1

SERVICE PROCEDURE

THIS SERVICE PROCEDURE IS TO REPLACE THE 4TH CLUTCH HOUSING BOLT SHOWN ON PAGE 7A-17B-12, FIGURE 24, ITEM #26 IN THE 1994 C/K UNIT REPAIR MANUAL:

1. RAISE THE VEHICLE AND SUPPORT IT WITH SAFETY STANDS.

2. PLACE A DRAIN PAN UNDER THE TRANSMISSION OIL PAN.

3. REMOVE THE SEVENTEEN OIL PAN BOLTS FROM FRONT AND SIDES ONLY AT FIRST TO DRAIN THE OIL. (USE A 10 MM SOCKET. LOOSEN THE REAR OIL PAN BOLTS APPROXIMATELY 4 TURNS).

4. LIGHTLY TAP THE OIL PAN WITH A RUBBER MALLET OR PRY DOWN TO ALLOW THE FLUID TO DRAIN.

5. REMOVE THE REMAINING OIL PAN BOLTS, OIL PAN, AND GASKET (WHICH MAY BE REUSED).

6. REMOVE THE OIL FILTER AND MULTILIP SEAL (THE SEAL MAY BE STUCK IN THE CASE.)

7. DISCONNECT THE WIRE HARNESS ASSEMBLY FROM THE FIVE HOOKUPS.

8. REMOVE THE SIX BOLTS USING AN 8MM SOCKET, FROM THE PRESSURE MANIFOLD ASSEMBLY. (BE CERTAIN THE FIVE O-RINGS ARE ATTACHED TO THE PRESSURE MANIFOLD ASSEMBLY.

9. REMOVE THE TWENTY-ONE BOLTS FROM THE VALVE BODY ASSEMBLY AND MANUAL DETENT SPRING ASSEMBLY.

10. REMOVE THE FLUID LEVEL INDICATOR STOP, THE LUBE PIPE RETAINER, THE LUBE PIPE AND CLAMP.

11. REMOVE THE CONTROL VALVE ASSEMBLY INCLUDING THE ACCUMULATOR HOUSING ASSEMBLY, VALVE BODY GASKETS, SPACER PLATE, AND ACCUMULATOR GASKET, (MAKE SURE THERE IS NO GASKET MATERIAL LEFT ON THE CASE SURFACE).

12. REMOVE THE EIGHT CHECK BALLS FROM THE SPACER PLATE NOTING THE LOCATIONS.

13. REMOVE THE FOURTH CLUTCH CASE BOLT. IF THE FOURTH CLUTCH CASE BOLT IS BROKEN OR BREAKS DURING REMOVAL, REMOVE THE REMAINING PIECE OF BOLT WITH A SCREW EXTRACTOR.

14. INSTALL THE NEW FOURTH CLUTCH CASE BOLT AND TIGHTEN TO 23 NM (17 LB. FT.). DO NOT OVER TORQUE.

15. INSTALL THE EIGHT CHECK BALLS IN THE PROPER LOCATION IN THE CASE FLUID PASSAGES USING TRANSJEL J-36850 OR EQUIVALENT TO HOLD THEM IN PLACE.

16. INSTALL A NEW VALVE BODY TO CASE GASKET INTO THE VALVE BODY ASSEMBLY.

17. INSTALL THE COMPLETE VALVE BODY ASSEMBLY ONTO THE CASE USING SEVERAL BOLTS TO HOLD IT IN PLACE. (MAKE SURE TO ATTACH THE MANUAL SHAFT TO THE DETENT LEVER AND PIN ASSEMBLY).

18. INSTALL THE PRESSURE SWITCH MANIFOLD WITH O-RINGS ONTO THE VALVE BODY ASSEMBLY.

19. INSTALL THE FLUID INDICATOR STOP, THE LUBE PIPE AND CLAMP AND THE MANUAL DETENT SPRING ASSEMBLY.

20. INSTALL THE REMAINING VALVE BODY BOLTS.

21. TIGHTEN ALL VALVE BODY AND PRESSURE SWITCH MANIFOLD BOLTS TO 11 NM (97 LB-IN).

22. CONNECT THE WIRE HARNESS ASSEMBLY TO THE FIVE HOOKUPS.

23. INSTALL THE OIL FILTER AND MULTILIP SEAL

24. INSTALL THE TRANSMISSION OIL PAN SEAL (REUSABLE) AND OIL PAN. TIGHTEN THE TRANSMISSION OIL PAN BOLTS TO 24 NM (18 LB-FT).

25. FILL THE TRANSMISSION TO THE PROPER LEVEL WITH DEXRON III TRANSMISSION FLUID. DO NOT OVERFILL.

26. CHECK THE OIL PAN GASKET FOR LEAKS.

27. INSTALL CAMPAIGN LABEL.

CAMPAIGN IDENTIFICATION LABEL

EACH VEHICLE CORRECTED IN ACCORDANCE WITH THE INSTRUCTIONS OUTLINED IN THIS PRODUCT CAMPAIGN BULLETIN WILL REQUIRE A "CAMPAIGN IDENTIFICATION LABEL". EACH LABEL PROVIDES A SPACE TO INCLUDE THE CAMPAIGN NUMBER AND THE FIVE (5) DIGIT DEALER CODE OF THE DEALER PERFORMING THE CAMPAIGN SERVICE. THIS INFORMATION MAY BE INSERTED WITH A TYPEWRITER OR A BALL POINT PEN.

EACH "CAMPAIGN IDENTIFICATION LABEL" IS TO BE LOCATED ON THE RADIATOR CORE SUPPORT IN AN AREA WHICH WILL BE VISIBLE WHEN THE VEHICLE IS BROUGHT IN FOR PERIODIC SERVICING BY THE OWNER. ADDITIONAL "CAMPAIGN IDENTIFICATION LABELS" CAN BE OBTAINED FROM DAC.

APPLY "CAMPAIGN IDENTIFICATION LABEL" ONLY ON A CLEAN, DRY SURFACE.

CLAIM INFORMATION

SUBMIT A PRODUCT CAMPAIGN CLAIM WITH THE INFORMATION BELOW:

* REPAIR PC FAIL PARTS CC-FC LABOR LBR OTHER NET PERF. PART NO. ALLOW OP. HRS HRS AMT -------------------------------------------------------------- REPLACE 2 8686124 ** SK-00 V9460 1.3 0.1 4TH CLUTCH BOLT (INCLUDES REMOVAL OF BROKEN BOLT)

* CAMPAIGN ADMINISTRATIVE ALLOWANCE

** THE "PARTS ALLOWANCE" SHOULD BE THE SUM OF THE CURRENT GMSPO DEALER NET PRICE PLUS 40% OF ALL PARTS REQUIRED FOR THE REPAIR. TRANSMISSION FLUID SHOULD BE ENTERED IN NET AMOUNT AT DEALER COST PLUS 40%.

LIST OF VEHICLES INVOLVED.

SHIP TO INVOICE VIN

------ ------- ----------------- 03827 03827 1GCGC34K5SE114522 04286 04286 1GBHC34K0SE114596 05168 05168 1GCGC29K5SE113521 05222 05222 1GCGC29K7SE114010 06012 06012 1GCGC29K8SE114534 06012 06012 1GCGC29K8SE114730 06330 06330 1GCGG35K6SF133609 06330 06330 1GCGG35K7SF133618 06464 06464 1GCGC29K6SE114581 06464 06464 1GCGC29K2SE114870 07149 07149 1GCGC29KXSE114504 07235 07235 1GCGC29K4SE114630 07302 07302 1GCGC29K3SE114781 07354 18340 1GCGC24K5SE114806 08335 08335 1GCGC29K3SE114814 08454 08454 1GCGC29K4SE114742 08597 08597 1GCGC29K5SE114507 14505 14505 1GCGG35K4SF133950 15308 15308 1GCGC29K8SE114758 16140 16140 1GCGC24K2SE114570 16140 16140 1GCGC24K3SE114612 20039 11459 1GCGC34K6SE114075 20039 11459 1GCGC34K2SE114848 20039 11459 1GCGC34K3SE114860 24196 24196 1GCHC39K0SE114604 24478 24478 1GBGC24K5SE114793 26343 26343 1GCGC29K8SE113478 30198 30198 1GCGC29K2SE114674 30369 30369 1GCGC29K6SE114726 30487 30487 1GCGC29KISE114519 32205 32205 1GBHC34K8SE114717 36017 36017 1GCGK29N2SE114803 39121 39121 1GCGC29K7SE114900 39522 39522 1GBGC34K9SE114530 59594 59594 1GCGG35KXSF133600 59594 59594 1GCGG35K9SF133958 59594 59594 1GCGG35K0SF133962 59594 59594 1GCGG35K5SF133990 59594 59594 1GCGG35KXSF134102 59634 59634 1GCHG35K7SF133493 59634 59634 1GCHG35K4SF133497 59634 59634 1GCHG35K2SF133532 59634 59634 1GCHG35K0SF133559 59634 59634 1GCHG35K2SF133594 59634 59634 1GCHG35K4SF133662 59634 59634 1GCHG35K9SF133995 59634 59634 1GCHG35KlSF134008 59634 59634 1GCHG35K7SF134336 59822 59822 1GBGC34K6SE114548 59822 59822 1GCGC34K6SE114822 62579 05074 1GBHG3lK8SF133884 73854 59198 1GBHG3lK7SF133553

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.